/// <summary>
/// Checks whether a particular gas exceeds
/// the rate of change nominated in the
/// appropriate table.
/// </summary>
/// <param name="currentDga">The current or latest DGA.</param>
/// <param name="previousDga">The previous DGA.</param>
/// <param name="gas">The Gas for which the rate needs to be checked</param>
/// <returns>True if the table value is exceeded</returns>
private bool CheckRateOfChange(DissolvedGasAnalysis currentDga, DissolvedGasAnalysis previousDga, Gas gas, ref List <IOutput> outputs)
{
var rateOfChange = helper.RateOfChange(currentDga, previousDga, gas, new TimeUnits.Year());
var lowerRate = TypicalRatesOfIncrease[gas].Item1;
var upperRate = TypicalRatesOfIncrease[gas].Item2;
var rateUnit = "ul/l/year";
// If oil volume is available, make the appropriate conversion.
if (OilVolume != null && OilVolume.Value != 0.0)
{
rateOfChange = rateOfChange * OilVolume.ConvertTo(new VolumeUnits.Litre());
lowerRate = lowerRate * OilVolume.ConvertTo(new VolumeUnits.Litre());
upperRate = upperRate * OilVolume.ConvertTo(new VolumeUnits.Litre());
rateUnit = "ul/year";
}
if (rateOfChange != null && rateOfChange > upperRate)
{
if (!outputs.Exists(o => o.Name == $"{gas.ToString()} Rate of Change"))
{
outputs.Add(new Output()
{
Name = $"{gas.ToString()} Rate of Change", Description = $"The rate of change of {gas.ToString()} is {rateOfChange.Value.ToString("0.00")} {rateUnit} which is higher than the typical value of {upperRate.ToString("0.00")} {rateUnit}."
});
}
return(true);
}
else if (rateOfChange != null && rateOfChange <= lowerRate)
{
if (!outputs.Exists(o => o.Name == $"{gas.ToString()} Rate of Change"))
{
outputs.Add(new Output()
{
Name = $"{gas.ToString()} Rate of Change", Description = $"The rate of change of {gas.ToString()} is {rateOfChange.Value} {rateUnit} which is lower than the typical value of {lowerRate} {rateUnit}."
});
}
return(false);
}
return(false);
}
